One-Way Clutch Intermediate
The intermediate one-way clutch, shown in the following illustration, holds the forward/reverse sun gear stationary relative to the case in second gear. The outer race of the intermediate one-way clutch is splined to the intermediate clutch, which in turn is splined to the case. The inner race is part of the intermediate brake drum, which is connected to the sun shell. The sun shell is splined to the forward/reverse sun gear.
In second gear, the intermediate clutch holds the outer race of the intermediate one-way clutch. Torque from the vehicle acts counterclockwise on the output shaft, and in turn on the forward planetary carrier and the reverse ring gear. Torque from the center shaft is counterclockwise.
This combination applies a counterclockwise torque on the sun gear and likewise the intermediate one-way clutch. The intermediate one-way clutch engages, causing the forward ring gear to turn the forward planetary carrier clockwise at reduced speed. During coast, the intermediate one-way clutch allows the sun gear to spin clockwise as the engine rpm coasts down.
The intermediate one-way clutch overruns in third, fourth and REVERSE gears. The direct clutch is engaged, causing the intermediate brake drum to rotate clockwise with the center shaft. With the intermediate drum rotating clockwise, the inner race also rotates clockwise, causing the intermediate one-way clutch to overrun.
In first gear, the outer race of the intermediate one-way clutch is not held, and the intermediate one-way clutch is overrunning.